Finally, a silver lining in all of that salt water that flooded parts of Louisiana during hurricanes Katrina and Rita: A lot of pesky fire ants died. The invasive little bugs, which bite with a real sting and often push “good” ants out of an area, apparently don’t mix well with salt water, according to findings by LSU Agriculture Center entomologist and Professor Linda Hooper-Bui and her researchers. Fire ants arrived in Mobile, Ala., from their native South America in the early 1900s and have spread across the southern United States. They are found in all 64 Louisiana parishes. Researchers...